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High Vacuum & Physics Research & Development |
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Brush Wellman - Electrofusion Products designs and builds Ultra High Vacuum engineered products for all types of research and scientific projects. We specialize in the design, fabrication, and testing of high performance components and assemblies which require vacuum tightness, high temperature bakeouts, and/or highly accurate mechanical tolerances. Materials used for these products include copper, aluminum, titanium, stainless steel, and beryllium.
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SYNCHROTRON BEAMLINE WINDOWS
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BW-Electrofusion has built more actively-cooled synchrotron beamline beryllium window assemblies than all other manufacturers in the world combined.
There are some key advantages which set us apart from the rest: 1) we are the only fully integrated manufacturer, performing all critical processing in-house, from the beryllium fabrication, to the design, to the joining and the qualification testing, 2) we offer the widest range of joining options, from epoxy bonding to electron beam welding to liquidus brazing to diffusion bonding, 3) BW-Electrofusion has been in the beryllium window assembly business since 1966, offering more combined years of expertise than any other company's staff.
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As engineers and scientists worldwide endeavor to improve window assembly designs, the most recent findings indicate that lower temperature processing, without sacrificing high temperature capability is a key element to optimal window performance. BW-Electrofusion's diffusion bonding process relies on lower temperature silver-based braze alloys, and we complete the metallurgical joint while remaining below the alloy's liquidus temperature, so as not to induce structurally-weakening grain growth in the beryllium material. In addition, our fixturing design combined with the lower temperature process gives us greater control over braze alloy flow than in a typical liquidus brazing operation. We have built assemblies by this method which have been in service for more than ten years without failing and at demanding sites such as DESY, CERN, Brookhaven, Argonne, Fermi, SLAC, KEK, INFN, ESRF, Daresbury, SPRing-8, INDUS-1, and others. While we can build to meet your specific requirements, we also offer a catalog of standard size Conflat flanges with diffusion bonded beryllium windows at greatly reduced lead times.
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BERYLLIUM BEAMPIPES
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Another distinct UHV engineered product manufactured at BW-Electrofusion is the beryllium beam pipe. We have built beam pipes over 100 feet in length (over 30 meters), with diameters ranging from 0.5" up to 24" (12.5mm to 600mm). End-fittings have been fabricated in a variety of materials--aluminum, stainless steel, and titanium. Fittings can be brazed, welded, or epoxy bonded to the central cylinder, and the beam pipe can be lined with other metals to enhance electrical conductivity, or receive a corrosion-resistant coating, depending on operational requirements.
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BERYLLIUM DOMES AND CYLINDERS
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BW-Electrofusion builds thin-walled beryllium domed and cylindrical windows for cryogenic applications. We can machine seamless windows below 0.010" (0.25mm) wall thickness, and form sheet and foil domes and cylinders of even thinner gauges, if necessary. We can also join the beryllium windows to UHV chambers, Conflat flanges, or custom-design fittings according to your needs.
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ULTRA HIGH VACUUM CHAMBER
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For UHV chambers with integral beryllium windows for particle physics research, BW-Electrofusion is the source. We offer design assistance to optimize the chamber for functionality and manufacturability. Consult us for solutions to your design challenges.
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